/usr/lib/python2.7/dist-packages/ufl/equation.py is in python-ufl 1.4.0-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 | "The Equation class, used to express equations like a == L."
# Copyright (C) 2012 Anders Logg and Martin Sandve Alnes
#
# This file is part of UFL.
#
# UFL is free software: you can redistribute it and/or modify
# it under the terms of the GNU Lesser General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# UFL is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public License
# along with UFL. If not, see <http://www.gnu.org/licenses/>.
#
# First added: 2011-06-21
# Last changed: 2011-06-22
class Equation:
"""This class is used to represent equations expressed by the "=="
operator. Examples include a == L and F == 0 where a, L and F are
Form objects."""
def __init__(self, lhs, rhs):
"Create equation lhs == rhs"
self.lhs = lhs
self.rhs = rhs
def __nonzero__(self):
"Evaluate bool(lhs_form == rhs_form)."
if type(self.lhs) != type(self.rhs):
return False
# Try to delegate to equals function
if hasattr(self.lhs, "equals"):
return self.lhs.equals(self.rhs)
# Fall back to repr
return repr(self.lhs) == repr(self.rhs)
def __eq__(self, other):
"Compare two equations by comparing lhs and rhs."
return isinstance(other, Equation) and \
bool(self.lhs == other.lhs) and \
bool(self.rhs == other.rhs)
def __repr__(self):
return "Equation(%r, %r)" % (self.lhs, self.rhs)
|